Control of carburetors



Patented Nov. 10, 19725.

UNITED STATES Memos JEAN-BAPTISTE `iiiiiaiaiinou, oF PARIS, 'RANCE.

CONTROL OF CARBURETORS.

Original application filed February 23, 1924, Serial No. 694,805.Divided and this application filed June i0, 1925. Serial No. 36,237. e

To all whom t may concern y Be it known that I, MARiUsJEAN-BAP- TisTEBARBAROU, citizen of the French Republic, residing at Paris, in theFrench Republic, have invented new and usefullmprovements in the Controlof Carbuietors, of which the following is a specification.

The invention relates to a. control device for the automatic regulationof the maximum opening of the throttle ofthe carburetor of an internalcombustion engine, according to the altitude at which the engine isworking, and is a division of my applicaltion Serial No. 694,805, filedFeb. 23, 1924. The device is especially designed for engines actuatingvehicles or aircraft and particularly when the vehicle has but oneengine and when the automatic control of the carburetor can be placedwithin the reach of the pilot.

According to the invention the control.

gear connecting the control member actuated by the pilot. to thecarburetor throttle, comprises a pivoting member, means for removablylocking said control member in po-v sition upon the pivoting member, anelastic membrane subjected on one face toa predetermined lconstantpressure and on the other face to the surrounding atmospheric pressure,means for operatively connecting said pivoting member to said elasticmembraney and yielding means for constantly urging said pivoting membertowards its position corresponding to the highest atmospheric pressure.

The appended drawing shows byvway of example a preferred embodiment ofthe con-h trol device according to the invention. l Y

In the construction shown in the drawing, the pipe-1, which supplies tothe engine the gases coming from the carburetor, carries a shaft 2 onwhich is movable the throttle 3. The throttle 3 is secured to a lever 4to which is attached one end of a control rod connected at its other endwith the controlk lever 28, pivoted at 29 on a fixed axle.

This lever 28 carries a pawl 31 which can constant pressure; the rod *Lcarries a stud 38 engaged in a slot 39 formed in the quadrant 32. i

' It will be readily understood that ifthe engine is working on-theground, the quadrant is urged by the spring 34 upon the stop-piece 33,and the toothed part of this quadrant determines the amplitude ofoscillation provided for the lever 28. If the outer air pressurediminishes, 'the diaphragm 35 will rise and will drive the rod 35aupwardly. This rod 35a causes the quadrant 32 and the lever 28 tooscillate on the shaft 29 in opposition to the action of the spring 34.In these Vconditions the lever 228 rotates to a greater extent thanheretofore in the direction of the arrow 40, and if this directioncorresponds to the direction-of openingof the carburetor throttle, itwill be feasible to lopen the said throttle to a greaterfdegree.

the carburetor throttle willr thus be reduced to the increase ofpressureofv the according outer air.'

.Various constructional modifications'l mayI obviously be brought to theabove described,

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device-without departing froml the spirit of' the invention.

Having now described myv invention whatl I clair'n new anddesire tosecure by Letters P atent is: 3

member in position upon said sector, an elas-l n ticmembrane subjectedon one face to a predetermined constant pressure and on the other faceto the surrounding atmospheric pressure, means for o erativelyvconnecting said sector to said `e astio membrane and yielding means forconstantly urging said sector towards its position corresponding to thehighest atmosplheric pressure.

Inl testimony w name to this specification.

. MARIUS JEAN-BAPTISTE BARBAROU.

ereof I have signed my i uo .f A control gear for the carburetor of an'Y internal combustion engine comprising in

